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comparison druntime/src/compiler/dmd/arraycat.d @ 1458:e0b2d67cfe7c

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Added druntime (this should be removed once it works).
author Robert Clipsham <robert@octarineparrot.com>
date Tue, 02 Jun 2009 17:43:06 +0100
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1456:7b218ec1044f 1458:e0b2d67cfe7c
1 /**
2 * Implementation of array copy support routines.
3 *
4 * Copyright: Copyright Digital Mars 2004 - 2009.
5 * License: <a href="http://www.boost.org/LICENSE_1_0.txt>Boost License 1.0</a>.
6 * Authors: Walter Bright, Sean Kelly
7 *
8 * Copyright Digital Mars 2004 - 2009.
9 * Distributed under the Boost Software License, Version 1.0.
10 * (See accompanying file LICENSE_1_0.txt or copy at
11 * http://www.boost.org/LICENSE_1_0.txt)
12 */
13 module rt.arraycat;
14
15 private
16 {
17 import core.stdc.string;
18 debug import core.stdc.stdio;
19 }
20
21 extern (C):
22
23 byte[] _d_arraycopy(size_t size, byte[] from, byte[] to)
24 {
25 debug printf("f = %p,%d, t = %p,%d, size = %d\n",
26 from.ptr, from.length, to.ptr, to.length, size);
27
28 if (to.length != from.length)
29 {
30 throw new Exception("lengths don't match for array copy");
31 }
32 else if (to.ptr + to.length * size <= from.ptr ||
33 from.ptr + from.length * size <= to.ptr)
34 {
35 memcpy(to.ptr, from.ptr, to.length * size);
36 }
37 else
38 {
39 throw new Exception("overlapping array copy");
40 }
41 return to;
42 }